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India ink (British English: Indian ink; [1] also Chinese ink) is a simple black or coloured ink once widely used for writing and printing and now more commonly used for drawing and outlining, especially when inking comic books and comic strips. India ink is also used in medical applications.
This can be achieved by smearing the sample onto the slide and then applying nigrosin (a black synthetic dye) or India ink (an aqueous suspension of carbon particles). After drying, the microorganisms may be viewed in bright field microscopy as lighter inclusions well-contrasted against the dark environment surrounding them. [ 6 ]
The manufacture of India ink was well-established by the Cao Wei dynasty (220–265 AD). [13] Indian documents written in Kharosthi with ink have been unearthed in Xinjiang. [14] The practice of writing with ink and a sharp pointed needle was common in early South India. [2] Several Buddhist and Jain sutras in India were compiled in ink. [3]
Phaser brand solid ink color, dye-sublimation printers printer business acquired by Xerox Teletype Texas Instruments: serial matrix, inkjet, low-end laser, airline ticketing printer business acquired by GENICOM Toshiba: Trilog color serial matrix printers acquired by Centronics TVS Electronics dot matrix printers
Structure of a major component of the dye nigrosin. In staining dyes, nigrosin (CI 50415, Solvent black 5) is a mixture of black synthetic dyes made by heating a mixture of nitrobenzene, aniline, and hydrochloric acid in the presence of copper or iron. [1] Related to induline, it is a mixture of phenazine-based compounds.
Solid ink printers have an advantage over ink-jet printers for situations involving intermittent use with long periods of downtime. This is because melted solid ink that has subsequently cooled and re-solidified inside the ink-delivery pathways is a normal part of printer operation. So, this cooled-and-solidified ink does not dry out.
In the case of transmission electron microscopy, opaqueness to electrons is related to the atomic number, i.e., the number of protons.Some suitable negative stains include ammonium molybdate, uranyl acetate, uranyl formate, phosphotungstic acid, osmium tetroxide, osmium ferricyanide [clarification needed] [2] and auroglucothionate.
India is the country with largest number of printing presses in the world (Europe: 1.18 lakh, China: 1.13 lakh, USA: 50,000, Japan: 45,000, Korea: 42,000 and Australia: 40,000). India with approx. 25 lakh employees is second only to China (30.25 lakh) so far as the number of employees in printing sector is concerned.